Re:Hadoop is a distributed computing platform
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Hadoop 1.0 Released
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There is a distributed filesystem built on top of hadoop called HDFS.
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I would say that Hadoop runs on top of HDFS. That is, the Hadoop layer expects to use a distributed filesystem which has some location awareness (allowing processing tasks to be sent to the nodes containing the data) and a level of resilience to individual datanodes failing (there is at least 2-way replication of data assumed in a typical HDFS configuration). The HDFS API expected by Hadoop can be implemented by other filesystems, such as Kosmos File System, mentioned above.
Apos for posting this comment again, but I had the suspicion that posting anonymously was hiding my comment...
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There is a distributed filesystem built on top of hadoop called HDFS.
...
I would say that Hadoop runs on top of HDFS. That is, the Hadoop layer expects to use a distributed filesystem which has some location awareness (allowing processing tasks to be sent to the nodes containing the data) and a level of resilience to individual datanodes failing (there is at least 2-way replication of data assumed in a typical HDFS configuration). The HDFS API expected by Hadoop can be implemented by other filesystems, such as Kosmos File System, mentioned above.
Apos for posting this comment again, but I had the suspicion that posting anonymously was hiding my comment...